Regarding GCC mips64 cross compiler for x86

[Steve Ellcey]

On Thu, 2015-10-29 at 15:44 -0700, Sasikumar Kandhasamy wrote:
> 
> 
> Thanks Steve. I started building the gcc toolchain for mips64 for
> languages c,c++ and fortran. I got struck in making gcc supported
> libraries.

> If you have the steps to build the toolchain for mips, Can you please
> share it. Below are the steps, i followed.

> target=maps64-linux,

> 1. configured and build bin-utils version 2.25
> 2. configured and build bootstrap on gcc version 5.1.0
> 3. configured and build glibc using above built target mips64
> 4. again in gcc, was trying to build libgcc.

> At step 4, i am getting an error related to libc.so. i.e., "libc.so:
> error adding symbols: File in wrong format" and I tried creating
> libc.so as below,

> mips64-linux-gcc -nostdlib -nostartfiles -shared -x c /dev/null
> -o /fortran/cross/mips64-linux/lib/libc.so

> Can you please let what is the error about. Thanks.
> 
> Thanks & Regards
> Sasi

I don't think you want to build 'bootstrap' in step 2 since this is a
cross compiler.  I use 'all-gcc', though 'bootstrap' might have been
changed by configure/make to 'all-gcc' since it was a cross build.

Also, make sure your path is set so that GCC can find the linker and
assembler that it needs.
> 
I'm not sure where the libc.so message is coming from.  One thing to
note is that the mips64-linux target is a multi-lib target that can
build o32, n32, and n64 objects (the three ABI's that MIPS supports).
If you only care about one ABI you might try adding'--disable-multilibs'
along with '--with-abi=n32' or '--with-abi=n64' depending on which ABI
you want to see if that helps.  I have some build instructions and a
script at

 https://dmz-portal.mips.com/wiki/GCC_Build_Instructions

That should be visible to you and you can try that build method if you
want.

Steve Ellcey